Defendant appeals from a conviction, after trial by jury, for driving while there was .10 percent or more by weight of alcohol in his blood, in violation of 23 V.S.A. § 1201(a) (1). He claims that the trial court erred in allowing the admission of the results of an alcohol breath test and refusing to give a requested jury instruction. He further claims that the court erred in denying his motion for a directed verdict of acquittal. We disagree with defendant’s arguments and affirm.
The circumstances surrounding defendant’s arrest and subsequent conviction are not disputed. Essentially, defendant was involved in an automobile accident with another vehicle in a. grocery store parking lot at 3:00 a.m. on May 29, 1982. He admitted to the investigating officer that he had consumed approximately six beers since the early afternoon; his breath had a faint odor of alcohol, and he was emotional and clearly very upset about the damage to his car. However, defendant was cooperative with the investigating officers and appeared to be in control of his faculties. No field dexterity tests were administered to defendant, but he was given an alco-sensor test. On the basis of that preliminary test, defendant was detained for further processing. A breath sample was then administered, and the gas chromatograph analysis revealed blood alcohol content of .16 percent.
The focus of defendant’s argument is that the officer did not have “reasonable grounds to believe” that he was intoxicated, as required by 23 V.S.A. § 1202(a), because he acted normally and appeared in control of his faculties. Thus, defendant claims that the officer was without authority to administer the more sophisticated gas chromatograph test which led to defendant’s *390 conviction. See id. In other words, defendant contends that the results of tests with the preliminary breath alcohol screening device, pursuant to § 1202 (b), absent external manifestations of intoxication, may not alone provide an officer with reasonable grounds to employ more sophisticated and reliable testing. However, for reasons which appear below, we decline to so hold.
First, viewing the evidence in the light most favorable to the State as the prevailing party below, we note that the mild odor of alcohol, defendant’s excited state and his admission of alcohol consumption, in conjunction with the fact of the 3:00 a.m. automobile accident and admitted operation, would appear to provide reasonable grounds for further inquiry by a law enforcement officer.
Second and more important, however, defendant’s reasoning ignores the express statutory language and the clear intent of the legislature. 23 V.S.A. § 1202 (a) creates a quid pro quo between the licensed driver and the state: in exchange for the privilege of driving in Vermont, the operator “is deemed to have given his consent” to provide samples of his breath to determine the alcohol content of his blood. This implied consent does not, however, leave the motorist stripped of procedural safeguards. Section 1202(c), for example, provides several protections not here in issue. Nevertheless, § 1202(a) allows the taking of a breath sample whenever an officer “has reasonable grounds to believe that the person was operating, attempting to operate or was in actual physical control of any vehicle while under the influence of intoxicating liquor.” Moreover, § 1202(b) expressly provides that the “preliminary breath alcohol screening device [may be used] to determine whether further and more accurate testing is appropriate.”
Defendant points to our holding in
State
v.
Rollins,
Although not without some force, the assertion that the legislature itself has determined the preliminary device to he so inaccurate as to be per se inadmissible, id., is of no avail. The inadmissibility of preliminary test results at trial does not deprive them of all utility, but merely reflects a determination that more sensitive measurements are easily available and therefore should be used.
We view the aleo-sensor as a quick and minimally intrusive investigative tool which performs a valuable function as a screening device. Cf.
McGarry
v.
Costello,
Defendant’s two other claimed errors fall with our rejection of his first challenge. After the jury was charged, defendant requested an additional instruction asking the jury to decide whether the officer had reasonable grounds to request a breath test. We have held above that reasonable grounds for further investigation existed as a matter of law. In any event, questions of the admissibility of evidence, here the breath test *392 results which are defendant’s ultimate target, are determined by the court. See V.R.E. 104. The belatedly proposed instruction was properly refused.
Finally, defendant submits that the court erred in denying his motion for a directed verdict of acquittal. Viewing the evidence in the light most favorable to the State, in order to determine its sufficiency to convince a reasonable trier of fact of defendant’s guilt beyond a reasonable doubt,
State
v.
Derouchie,
Judgment affirmed.
